Communicate with the module – Rockwell Automation 1738-OE2VM12 ArmorPoint 24V dc Analog Output Modules, Series A User Manual
Page 8
8 ArmorPOINT™ 24V DC Analog Output Modules
Publication 1738-IN004B-EN-E - July 2011
Communicate with the Module
I/O messages are sent to (consumed) and received from (produced) the ArmorPOINT
modules. These messages are mapped onto the processor’s memory. The ArmorPOINT
analog output modules produce 2 Bytes of input data (scanner Rx – fault status). They
consume 4 Bytes of output data (scanner Tx).
Default Data Map for Output Modules
Message size: 2 Bytes
15 14 13 12 11
10 09 08 07 06 05 04 03
02 01 00
Produces
(Scanner Rx)
High byte – channel 1 status
Low byte – channel 0 status
Not used
HCA LCA CM CF
Not used
HCA LCA CM CF
Where:
HCA = High Clamp Alarm; 0 = No error, 1 = Fault
LCA = Low Clamp Alarm; 0 = No error, 1 = Fault
CM = Calibration Mode; 0 = Normal, 1 = Calibration mode
CF = Channel Fault Status; 0 = No error, 1 = Fault
Message size: 4 Bytes
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
Consumes
(Scanner Tx)
Output channel 0 high byte
Output channel 0 low byte
Output channel 1 high byte
Output channel 1 low byte